Flicker in LED lighting is invisible to conscious perception but detectable by the nervous system, causing eye strain, headaches, fatigue, and in people with photosensitivity or epilepsy, more serious effects. Dulora's flicker-free globe range uses premium constant-current drivers that eliminate flicker entirely at every brightness level, meeting IEC flicker guidance standards with Pst LM below 1 and SVM below 0.4 across the full dimming curve from 1 to 100 per cent.
The entire Dulora range is built to these standards, but this collection gathers the globes most commonly specified for flicker-sensitive applications: bedroom and living room globes, bathroom vanity lights, and home office fittings where long-duration exposure makes stable light quality a genuine health consideration.
CRI ranges from CRI 80 to 97+ across the range, depending on globe type and application. For the colour temperature and form factor guide, see Warm White 2700K and Flicker-Free LED Globes: The Complete Guide. For dim-to-warm options that combine flicker-free performance with atmospheric shifting colour temperature, see LED Spotlights.
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Flicker-Free Globes: What Flicker Is, Why It Matters, and How Dulora Eliminates It
What is LED flicker and why can't most people see it?
Most LED globes flicker. They cycle on and off at a rate tied to the AC power frequency, typically at 100 or 120 times per second. At this rate, the human eye's conscious vision cannot detect the on-off cycling, so the light appears steady. The problem is that the visual cortex and nervous system can still detect the variation, even when the conscious mind cannot see it.
The cumulative effect is what produces the symptoms most people associate with eye strain or screen fatigue: tired eyes after an evening at home, headaches that build across the day, a vague sense of visual fatigue that lifts when you step outside. For people with photosensitivity, migraines, or epilepsy, the effect can be more acute and more immediate.
What does Pst LM below 1 and SVM below 0.4 mean in practice?
These are the two IEC flicker metrics that Dulora globes are built to meet. Pst LM (short-term flicker perceptibility, luminous) measures the likelihood that the flicker rate will cause perceptible visual discomfort. A value below 1 means the flicker is within the threshold considered imperceptible under IEC guidance. SVM (stroboscopic visibility measure) measures the likelihood of perceiving the stroboscopic effect of the light on moving objects. A value below 0.4 means the stroboscopic effect is below the threshold of perception for most people.
In plain terms: a globe meeting both standards produces light that is stable enough to not cause flicker-related symptoms in standard use, even at low dimming levels where most LED globes perform worst.
Why does dimming make flicker worse, and how does Dulora address this?
Most LED dimmers work by reducing the time the light is switched on within each AC cycle, a technique called pulse-width modulation. At low dimming levels, the light spends more time off than on within each cycle, which increases the visible effect of each off period. This is why many LED globes that seem flicker-free at full brightness produce visible flicker when dimmed down to 10 or 20 per cent.
Dulora's constant-current driver design maintains stable current delivery across the full dimming range, so the flicker performance at 5 per cent is as good as at 100 per cent. This is the design that makes flicker-free performance meaningful for pre-sleep and wind-down use, where low-level dim settings are exactly when stable light matters most for supporting your body's natural transition into rest.
Which Dulora globes are most important to upgrade for a flicker-sensitive household?
The highest-priority fittings are those where exposure duration is longest and proximity is closest: bedside lamps, bedroom ceiling lights, and home office task lighting. These are the fittings where flicker-related cumulative effects build most significantly, and where the difference between a flicker-prone globe and a constant-current globe is most noticeable in how you feel at the end of the day.
Bathroom vanity lighting is the second priority, particularly for households with members who are photosensitive or prone to migraines, since the close-range, face-level lighting of a vanity bar concentrates flicker exposure at precisely the time of day when it builds most. Living room and kitchen lighting matters too, but typically produces less cumulative exposure than the fitting you use closest to sleep.
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Frequently Asked Questions: Flicker-Free Globes
What does flicker-free mean for LED globes?
A flicker-free LED globe produces a stable, continuous light output without rapid variations that cause eye strain and fatigue. Dulora globes meet IEC flicker guidance standards with Pst LM below 1 and SVM below 0.4 at every brightness level, including at low dimming levels where many globes introduce the most flicker.
Are all Dulora globes flicker-free?
Yes. Every globe in the Dulora range uses a premium constant-current driver that meets IEC flicker guidance standards across the full dimming curve. The flicker-free collection specifically gathers the globes most commonly chosen for sensitive applications, but the same driver standard applies across the range.
Do Dulora globes meet flicker standards at low dimming levels?
Yes. Dulora's constant-current driver design maintains stable output across the full dimming range from 1 to 100 per cent, so the Pst LM and SVM values are met at 5 per cent brightness as well as at full output. This is where most standard LED globes fail the standard and where flicker-related symptoms are most likely to occur for pre-sleep use.
Are Dulora flicker-free globes suitable for people with epilepsy or photosensitivity?
Dulora flicker-free globes meet IEC flicker guidance standards and are designed to minimise flicker-related visual stimulation. For households where epilepsy or photosensitivity is a clinical concern, confirm with the relevant specialist whether the IEC Pst LM below 1 and SVM below 0.4 thresholds meet the specific requirements for your situation.
Are Dulora flicker-free globes certified for New Zealand?
Yes. All Dulora flicker-free globes carry AS/NZS certification for New Zealand mains voltage and are covered by a three-year product warranty.
Dimmable
CRI90+
470lm
In stock (100+ units)
